Grinding machine



Oct. 23, 1923. F. c. WEAVER GRINDING MACHINE Filed May 2, 1922 3 Sheets-Sheet 1 Oct. 23, 1923. 1,471,431

F. c. WEAVER GRINDING MACHINE Filed May 2, 1922 3 Sheets-Sheet 2 III Oct 23, 1 923. 1,471,431

F. C. WEAVER GRINDING MACHINE Filed May 2, 1922 s Sheets-Sheet 5 Patented Got. 23, 1923. v

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FLOYD c. WEAVER, or wesnme'ron, .nrsrnrcr or COLUMBIA. 7

v enrn nrnc MACHINE.

Application filed May 2, 1922. Serial No. 557,935

To all whom it may concern:

Be it known that I, FLOYD G. WEAVER, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Grinding Machines, of which the followingis a specification, reference-being had therein vto the accompanying drawings.

The object of this invention isto provide invention comprises certain IIOVBl-COlYlblIlflw tions,lconstructions and arrangements of 'parts'as will be hereinafter described, illustrated in the accompanying drawings, and

'more particularly pointed out in theap-' I pended claims,

7 plate and the driving mechanism operating In the drawings: Figure '1 is a plan view machine showing the relative arrangement of the lapping plate and the work carrying the lapping plate, etc., and the controlling equipment. 7 c i Figure 2 is a vertical section on the line 2-2, in Fig. 1, taken in the direction indiev cated by the arrows,'and shows the general arrangement-of the lapping plate'and the work carrying plate relative and driving mechanism. 7 V I Figure 3 1s a, vertical section on the line 3-3, 1n-F1g.,1, takenin the direction of the to the operating '-arrows,'and shows the relative position of the lapping plate and its operating pin relative to the work carrying plate and its driving mechanism.

Flgure 4 1s avertical section on the line 4-4 .in Fig. 1 taken'in the direction 'of the arrows showing the relative position of the' 'driving eccentrics for the operating mecha. 'nism for the lapping plate, and the driving mechanism. a e a Y Z Figure ,5 is a vertical section onthe line 5- -5, in Fig. l'taken in the direction of the arrows and shows the relative arrangement of the main driving shaft and power pulley etc., and parts of the operating andcontrol 1 mechanisms.

Referring to Figure 1, the lapping :plate 2 is moved by the pin 3 over the workcan j rying plate 1..- The pin 13 is securely clamped the lapping in the end of arm 31, which also carriesat" the opposite end from pin 3 a forked hinge bearing on the bearing collar 30 ofthe drivmg pin 29. Thus the pin 3 issecurely con-o nected to driving pin 29. The stroke arm 31 carries the adjustable clamping blocks'32 secured by screws 33, and forming the socket co J bearing for the ball end of bar 23 thus form ing'a flexible joint. I I M sliding adjustment in, stroke arm 22 by'the clamping screws 34 The stroke 111 522 carrles at its opposite end a fork hingejoii t to the bearing collar 2l on the driving pin 20. Thus the pin 3 is free to be lifted vertically from its socket in lapping plate 2, also the pin 3 is actuated by the combination of the motionsof the driving pins 29' and20. Driving pin 29- is securely but adjustably clamped in the s1ot35" of the oscillatingl arm 36 which is securely attached to the vertical oscillating axis 28 This axis 28 is in turn,

carried'upon the two arms 37 and 3 8jwhich 5' also form bearings, for the. os illation of axis 28. Arm 26 is also firmly w d t axis 28, and at its opposite end carries-the hinge pin-25 capable of being securely set-in adjustment in the slotf27. The arm and Strap -17 of the main 7 driving eccentric 18 is connected to arm 26 by the 311125; Thus the driving pin 29 is actuated throughppin'25 of driving eccentric strap 17- of the main secured inladjustment'in theslot 24 of the 1 eccentric plate 19, Thu's'fdriving pin 20 is actuated by the eccentric plate l 9l 1 Hence themovemen't of the pin 3 is a combination of the strokes of" the two driving eccentrics 18and1'9, c V Referring to Figure 2 inconjunction with Figure l, 'axis'28 is carried inworkingbearsecurely r111 38 41s ings of arms 37 andj38, each bein fastened to the verticalaxis 42. formed so that its outer end forms thesector of a worm wheel meshing with the worm pinion x 39 secured on the'shaft Thus with arms 37 and 38 eachsecurelv fastened then be swung about the axis 42 by the driving shaft 40 through the" medium of the worm pinion 39. The shaft 10 is provided driving eccentric 18, The driving pin 20is V l 3 to the osc'illating 'ax is '42, the 'a'iiis2'8' can b with ,ahand wheel'letl 'atl itsouter end,1thus enabling axis 28 about the axisf i2. j

'; Referring to Figures 4; and 5'in connection with Figured, the eccentric driving plate 19 and the driving eccentri'c' l S: "are theoper'ator atwill to swing the a pin connected to said lapping plate, a

each securely fastened to the vertical spindle L3, so that by turning the spindle L3 the eccentric plate 19 and the driving eccentric 18 may be set to position the and eccentric at a desired angle with respect. to the shaft 40. Attached to the vertical spindle a3 is the drivinworm or gear wheel 45 engaging the wor n or gear pinion l6 securely fastened to the main driving shaft 9;. This main driving shaft i l carries the power drivingpulley 18 which may be connected. to or disconnected from the main driving shaft 14 by the clutch 11 operated by lever 12. The bevel gear 15 is securely fastened to main driving shaft 14% and engages the bevel gear 9 secured firmly to the separate length of shaft 8. This short length of shaft '8 carrying gear 9, is connected at will of operator by the clutch 6, operated by lever 7, to'the main portion. of shaft 8 which carries the firmly secured worm orpinion gear 5 and the hand wheel 10 at its outer end.

Referring to Figure 3 in connection with Figure 1, the work carrying; plate is securely fastened to the vertical spindle 46. The driving worm wheel or gear 4 is firmly secured to this vertical spindle a6, and meshes with the worm or gear pinion 5 on shaft 8. .Thus by moving theclutch 6 to inoperative position, the work carrying;- plate 1 is then free to be rotated by hand wheel 10, even while lappingplate 2 is being driven over the work carrying plate 1 by the pin 3. Also by operating hand wheel ll, the axis 28 is swung about the axis 42, while the machine is in operation, thereby causing the orbit of the pin 3 to be shifted over the surface of the work carrying plate 1. By this shifting of the orbit of pin 3 in conjunction with the rotation of the work carrying; plate 1 by hand wheel 10, the lapping efiect of the plate 2 can be distributed at the will of the operator over any desired portion of the plate 1. Also when desired, plate 1 can be left to rotate automatically and the position of the path of strokes of plate .2

varied as desired by hand wheel 411.

While I have described the preferred embodiment of my invention, and have illus trated the same in the accompanying drawings, certain minor changes or alterations may appear to one skilled in the art to which this invention relates, during the extensive manufacture of the same and. I, therefore, reserve the right to make such alterations or changes as shall fairly fall within the scope of the appended claims.

Having'described the present invention what is claimed as new is 1. In a grinding and lapping machine of the character described, the combination of a work carrying plate, means for supporting said work carrying plate, a lapping plate positioned above said work carin inp plate,

stroke arm connected to said pin, means connected to the stroke arm intcrmeo .to its ends for oscillating said stroke a ant. means connected to said okc arm the end thereof for shifting the same forwardly and rearwardly, thereby shifting said lap ping plate in a variable manner, as and for the purposes forth.

2. In a grinding and lapping machine of the character described, the combination of a work carrying plate, means for supporting said work carrying; plate, a lapping plate positioned above said work carrying plate, a pin connected to said lapping; plate, stroke arm connected to said pin, a bar con nected to said stroke arm intermediate its ends, means adjust-ably connected to said bar for driving the with an adjustable stroke, whereby said bar will oscillate said stroke arm with an adjustable stroke, and driving means adjustably connected to the rear end of said stroke arm for ad: llCli and retracting said stroke arm with an aojustable stroke, whereby said lapping plate will be moved in a variable manner, as and for the purposes set forth.

' 3. In a grinding; and lapping machine of the character described, the combination of a work carrying plate, means for supporting said work carrying plate, a lapping plate positioned above said work carrying; plate, a pin connected to said lapping plate, a stroke arm connected to said pin, a bar con nected to said stroke arm, an eccentric drive plate, means for driving; said plate, a connecting means engaging said eccentric a second stroke arm of a tube like construction receiving said bar and said connectin means, means adjustably connecting said bar and said connecting means to said sec- 0nd stroke arm, and driving means connected to the rear end of said first stroke arm, as and for the purposes set forth.

" i. In a grinding; and lapping machine of the character described, the combination of a work carrying plate, means for supper I- said work carrying; plate, a lapping positioned above said work carrying plate.

a pin connected to said lapping plate, a stroke arm connected to said pin, a vertical oscillating axis, means for supporting said axis, an oscillating arm connected to said axis and to the rear end of said stroke arm, an arm connected at one end. to said axis and having a slot in its opposite end portion, a main driving; eccentric, means for driv said eccentric, a strap surrounding said eccentric and having a substantially triangir lar strap arm extending therefrom and carrying a pin at its apex, said pin fit ing" in said slot, as and for the purposes set forth.

5. In a grinding and lapping machine 0'- the character described, the combination or a work carrying plate, means for supporting;

a kn said work carrying plate, a lapping plate positioned above said work carrying plate, a pin connected to said lapping plate, a stroke arm connected to said pin, a fixedvertical axis, upper and lower arms pivotally mounted upon said fixed axis, a vertical oscillating axis carried by the outer ends of said upper and lower arms, whereby said last mentioned axis is movably supported, the outer end of the lower arm being formed to provide a sector shaped worm gear, a v

shaft having a worm pinion thereon engaging said worm gear, anoscillating, arm connected to the upper end'of sald second-men rtioned axis and to said stroke arm, a fourth FLOYD o. WEAVER. 

